Participation in a qualifying HDHP is a requirement for health savings accounts and other tax-advantaged programs. A qualifying plan must have a minimum deductible and out-of-pocket maximum which the Internal Revenue Service may modify each year to reflect change in cost of living. According to the instructions for IRS form 8889, "this limit does not apply to deductibles and expenses for out-of-network services if the plan uses a network of providers. Instead, only deductibles and out-of-pocket expenses for services within the network should be used to figure whether the limit is reached."